Jean Tigana quit as Bordeaux coach after fans harrassed his teenage daughter during a damaging 4-0 home loss to Sochaux, while Lille opened up a four-point lead at the league summit.
"It was a disastrous evening for the club and me," said Tigana, after seeing his side ship four goals in the space of just half an hour against their rivals for the final UEFA Europa League qualifying position. "My daughter was harassed in the stands. She's already getting hassle at school, so I'm taking the decision to end my journey with Bordeaux."
Tigana replaced Laurent Blanc last summer, but has been unable to reinvigorate the 2009 champions, who are 12 points short of the UEFA Champions League places.
Brown Ideye broke the deadlock in the ninth minute, with Damien Perquis capitalising on slack marking to head home a second two minutes later. Ideye out-paced Bordeaux right-back Mathieu Chalme before teeing up Ryad Boudebouz in the 22nd minute and the Nigerian then claimed his second goal of the game with a header from Marvin Martin's cross.
"I'd never won here before," said Sochaux coach Francis Gillot. "So to win 4-0, in the way we did, was a dream."
With Lorient held 0-0 at home by Toulouse, the emphatic win lifted Sochaux into sixth place, which is likely to yield a Europa League berth due to Lille and Paris Saint-Germain's involvement in the French Cup final.
Lille edge Nancy
In the day's later game, a lacklustre Lille edged third-bottom Nancy 1-0 to go four points clear of second-placed Marseille at the top of the table. Rudi Garcia's team were once again indebted to Eden Hazard for victory, the Belgian starlet bending a free-kick into the top-right corner in first-half injury time to illuminate an otherwise dreary encounter.
Nancy's Jonathan Brison was denied by Lille goalkeeper Mickael Landreau in the 77th minute, while Youssouf Hadji wasted the hosts' best chance by slicing wastefully wide in injury time. Lille will now cross their fingers for a favour from Lyon, who host defending champions Marseille on tomorrow in one of the traditional highlights of the French domestic calendar.
Earlier, PSG inched past Lyon into third place in the race for Champions League football after a 1-1 draw at Monaco. PSG could have gone three points clear of Lyon, who occupied the third and final Champions League qualifying spot going into the weekend, but they had to settle for a point against an obdurate Monaco side.
The hosts took the lead in the 24th minute, with Brazilian defender Adriano beating PSG goalkeeper Gregory Coupet with a flicked header from a Lukman Haruna free-kick. Deputising for the injured Stephane Ruffier, Monaco goalkeeper Sebastien Chabbert produced a series of eye-catching stops, but was beaten in the 51st minute when Mevlut Erding slammed home a technically impeccable volley.
"It's first of all a disappointment," said PSG coach Antoine Kombouare. "There was a chance to take the three points. But I congratulate my players, even though I think we need to be more efficient."
Elsewhere, a first-half Alejandro Alonso penalty gave Saint-Etienne a 1-0 win at relegated Arles-Avignon that took Les Verts to within a point of sixth spot.
Auxerre gave their bid to avoid the drop another fillip with a 1-0 win over Montpellier that lifted them into 12th place. Second-bottom Lens drew 1-1 at Caen, but demotion to Ligue 2 remains all but inevitable as they are now eight points from safety with only four games to play.